1. tracked against lines (or routes) drawn on the screen
2. haulted or allowed to pass onto the next route - depending on the state of the next signal colour
3. switch to another track, when presented with a point (which allows for a fork in the routes)

1. Route = is a vector with a start x & y coordinate and end x & y coordinate. This is considered an edge
2. Path = a collection of routes with no upper bound
3. Point = stores multiple paths, where only one can be active. Think of it as a switch that be change what path is active. This is considered a node
4. Journey = a list of routes to follow is a journey

The project has a requirements.txt for all dependencies + a lot more. You should be fine with just the pygame dependency though!

Only one train loads by default. To control the train movement press the space bar. Please press the space bar once. The train will only move if the next signal on its routes is not red. Only signals in in the active path can be controlled. This is a limitation in the game. Once the train reaches the end of its journey - the game will ungracefully crash with an index exception.

To change a trains journey, press the blue triangle button below each path. This is known as the point switch. Trains can have a maximum of 3 paths from a single point and a minimum of 1 path (although this is a bit pointless - but is shown for completeness).

There is no objective of the game really.

Please use the test classes provided for point_test and traverse_util_test before trying to add more routes to the main class, as they will help to sanitise routes are OK. New routes should be added to the 'routes_list' folder at the root of the project.

There are two signals overlayed at the bottom of the map - this stops a train moving completely to the last signal state. This can be corrected by updating route 4 and 6. If you change a trains route halfway through a journey - it will start from point 1 and move again to its signal position. This is because the entire route of the train is recalculated.